Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Probed from New York, United Stated

301 Moved Permanently

Checks

5 PASS 3 REVIEW 1 FIX

CDN & Delivery

Action

No CDN detected

FIX

No CDN detected

A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

Redirect Chain

2 redirect(s), 758 ms total

REVIEW

2 redirect(s), 758 ms total

2 redirects before reaching final URL

Each redirect adds latency. Try to minimize the chain to 1 hop.

WWW normalization redirect

Redirect overhead: 758 ms total

Got: 758 ms

Cross-domain redirect detected

https://degruyter.com

341 ms · HTTP/1.1

301

https://www.degruyter.com:443/

343 ms · HTTP/1.1

301

https://www.degruyterbrill.com:443/

74 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://degruyter.com	301	341 ms	HTTP/1.1	awselb/2.0
2	https://www.degruyter.com:443/	301	343 ms	HTTP/1.1	awselb/2.0
3	https://www.degruyterbrill.com:443/	200	74 ms	HTTP/1.1	CloudFront

See the visual redirect chain in the HTTP Probe tab →

Each redirect adds latency. Try to minimize the chain to 1 hop.

Why this matters

Redirect chain — each hop adds latency; combine into one redirect where possible.

Source: Google Search Central / web.dev

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

No IPv6 (AAAA) records found

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

No IPv6 Support

About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

TLS Certificate Expiry & Recommendations

324 days until leaf cert expires — 4 issues to address

REVIEW

Certificate validity

324

days left

0d 30d 60d 90d+

Recommended actions

Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
Enable DNSSEC on your domain for DNS spoofing protection
Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy

A+

DNS Records

3 A records, 16 ms lookup

PASS

3 A records, 16 ms lookup

Resolves to 3 IPv4 address(es)

Got: 51.102.102.227, 35.158.64.229, 18.159.16.152

No IPv6 (AAAA) records

4 nameserver(s) configured

Got: ns-1049.awsdns-03.org, ns-1691.awsdns-19.co.uk, ns-211.awsdns-26.com, ns-986.awsdns-59.net

1 mail exchanger(s) configured

CAA records not checked

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

SPF record present in TXT

DNS resolution time: 16 ms

Got: 16 ms

A	51.102.102.227, 35.158.64.229, 18.159.16.152
AAAA	—
CNAME	—
NS	ns-1049.awsdns-03.org, ns-1691.awsdns-19.co.uk, ns-211.awsdns-26.com, ns-986.awsdns-59.net
MX	0 degruyter-com.mail.protection.outlook.com
TXT	1password-site-verification=3KPKUV4EKFHUFKRKTETBX4Q634 HutKILPNIyeQSl3897uBVkBvzUzGntmt0vmlzh1qILAVs3HDW8B13lBvDhiIKoYTDc25xZ1W7VbIJnYI... MS=61CB4E998F5258CE72948134C2C5ADF19BFC0EF7 MS=ms96335304 SFMC-YSvRsFYGQf9bCvhLgen-kDwqYFSoS3PKP5eHLMnC amazon-business-verification=36f872ac193df43266ab465883054c72c44752ac3f36e71a896... apple-domain-verification=kWvo2lOAXoAI9NjC apple-domain-verification=zE3yfpWsZW3x4Bv atlassian-domain-verification=ECeVQnNbH9cORlOPX+RR1A8fXEyqUKmNlomSjvhJM4laoVgGH0... atlassian-sending-domain-verification=bda51a85-6b5f-430b-91c0-e35225da05b2 docusign=f5510ae0-b6c6-4d18-ba87-1b9277d17f91 google-site-verification=EtmVhR8-B9Ild0vWnXRig6_6jNS8WlsCGF5ZOykDOfU google-site-verification=tmZVEtiGqSY_dQjMan79BQGysoNiyFbX5xbFjU3Cp7s hj=1941698-28062022 pardot1014162=89fd9aa4b637937ed43fb9775087b9d159cb8297eccb8c909fcd3559ac333fe5 prowly-verification=7c269f015364240884965b030bec4411ff818929c7ff34ee13ad9555e1c8... sending_domain1014162=16c0036faf441702afc14b94e1fb0ee3cacce74d4789284cc67d0d4526... sending_domain1090872=b346eb3e659bb3d0dbd9d263975dafde0fbb1da5ed8e64dcfdad4eebe9... SPF v=spf1 ip4:46.30.81.128/27 ip4:217.110.58.242 ip4:72.22.165.246 ip4:46.30.84.112...
CAA	Lookup not available with standard resolver

Resolved in 16 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+

Crawlability

robots.txt present, sitemap with 1702 URLs

PASS

robots.txt present, sitemap with 1702 URLs

robots.txt is present

Got: 777 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 1702 entries

Sitemap index with 1702 child sitemaps

robots.txt references sitemap

robots.txt 200 OK

Size 777 B Sitemaps referenced 1 User-agents CCBot, FacebookBot, Omgilibot, *, Google-Extended, GPTBot Blocking No — crawling allowed

User-agent: *
Disallow: /search
Disallow: /search/series/*
Disallow: /search/parent/*
Disallow: /search/summary/products/*
Disallow: /search/keywords/*
Disallow: /seamlessaccess/*

Disallow: /openurl

Disallow: /database/*/search
Disallow: /database/*/browse

Disallow: /login
Disallow: /logout
Disallow: /myProducts
Disallow: /myPublications
Disallow: /myHoldings
Disallow: /contactForm

Sitemap: https://www.degruyterbrill.com/sitemap.xml

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: FacebookBot
Disallow: /

User-agent: Omgilibot
Disallow: /

# De Gruyter expressly reserves the right to use all content for commercial text and data mining within the meaning of Section 44b of the German Copyright Act.

sitemap.xml 200 OK

Type Sitemap Index URLs 1702 entries Valid XML Yes

Child Sitemaps:

A+

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

PASS

www/non-www, trailing slash, HTTP→HTTPS

www/non-www redirect configured correctly (preferred: non-www)

HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.degruyter.com/

200https://degruyter.com/

Preferred variant: non-www

HTTP → HTTPS

301http://degruyter.com/ → https://www.degruyter.com:443/

Consistent

A+

Domain Intelligence

degruyter.com — via InterNetX GmbH, 28 years, 9 months old, hosted on AWS

PASS

degruyter.com — via InterNetX GmbH, 28 years, 9 months old, hosted on AWS

Domain registered until Dec 8, 2026 (7 months remaining)

DNSSEC is not enabled

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Registrar: InterNetX GmbH

Registrar lock is NOT enabled

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Hosting: AWS

Got: AS16509

Domain expiry

175 days

December 8, 2026

SSL certificate

324 days

Issued by Amazon

Domain age

28 years, 9 months

Registered December 9, 1997

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

35.158.64.229

Registrar

InterNetX GmbH

Unlocked 4 NS records

Expiry timeline

Today

+1 year

Domain expiry SSL expiry Danger zone (≤30 days)

Recommended actions

Enable DNSSEC to protect visitors from DNS spoofing
Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers

Registrar InterNetX GmbH

Created December 9, 1997 (28 years, 9 months ago)

Expires December 8, 2026 (7 months)

Last Updated December 9, 2025

Name Servers ns-1049.awsdns-03.org, ns-1691.awsdns-19.co.uk, ns-211.awsdns-26.com, ns-986.awsdns-59.net

DNSSEC Not enabled

Hosting

IP Address 35.158.64.229

ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)

Provider AWS

Data source: rdap (0.2s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+

HTTP Probe Timing

Total 343 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

6 ms

TCP Connect

83 ms

TLS Handshake

169 ms

Time to First Byte

343 ms

Total Time

343 ms

Connection waterfall

DNS Lookup 6 ms TCP Connect 83 ms TLS Handshake 169 ms Server Processing 84 ms Content Transfer 0 ms

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.